Floor cleaning machine



FIG. 1 is a front perspective view of a floor cleaning machine showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is rear perspective view thereof;

FIG. 7 is top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines illustrating portions of the floor cleaning machine are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a floor cleaning machine, as shown and described. 